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  SSK7  SSKJr  S rg)	a  OpenGL extension EXT.read_format_bgra

This module customises the behaviour of the 
OpenGL.raw.GLES2.EXT.read_format_bgra to provide a more 
Python-friendly API

Overview (from the spec)
        
        This extension is intended to supplement the GL_OES_read_format
        extension by adding support for more format/type combinations to be used
        when calling ReadPixels.  ReadPixels currently accepts one fixed
        format/type combination (format RGBA and type UNSIGNED_BYTE) for
        portability, and an implementation specific format/type combination
        queried using the tokens IMPLEMENTATION_COLOR_READ_FORMAT_OES and
        IMPLEMENTATION_COLOR_READ_TYPE_OES (GL_OES_read_format extension).  This
        extension adds the following format/type combinations to those currently
        allowed to be returned by GetIntegerV:
        
        format                      type
        ------                      ----
        BGRA_EXT                    UNSIGNED_BYTE
        BGRA_EXT                    UNSIGNED_SHORT_4_4_4_4_REV_EXT
        BGRA_EXT                    UNSIGNED_SHORT_1_5_5_5_REV_EXT
        
        E.g. Calling GetIntegerv with a <pname> parameter of
        IMPLEMENTATION_COLOR_READ_FORMAT_OES can now return BGRA_EXT, with the
        corresponding call to GetIntegerv using a <pname> parameter of
        IMPLEMENTATION_COLOR_READ_TYPE_OES returning UNSIGNED_BYTE;

The official definition of this extension is available here:
http://www.opengl.org/registry/specs/EXT/read_format_bgra.txt
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